Prediction of Pre-reduction Shaft Furnace with Top Gas Recycling Technology Aiming to Cut Down CO2 Emission
スポンサーリンク
概要
- 論文の詳細を見る
Top gas recycling is considered as one of the highest potential technologies to improve reduction efficiency and correspondingly to reduce carbon consumption. As a typical nitrogen free ironmaking process, pre-reduction shaft furnace of COREX® process (COREX® shaft furnace) for short is suitable to adopt the technology aiming to cut down CO2 emission. Under the premise of constant total injection volume, three kinds of reducing gas injection methods are numerically studied by employing a two-dimensional mathematical model. The method that 20% of total reducing gas in volume fraction is blasted through normal inlet (NI) while the rest through down pipe inlet (PI) rather than deadman inlet (DI) could apparently improve gas flow in the inactive zone located near the bottom direct reduced iron (DRI) outlet, thus increasing DRI reduction degree to 61% under present calculation conditions. Meanwhile, either decreasing the vertical height of PI or increasing its diameter makes further improvement on furnace efficiency. After adopting top gas recycling to the shaft furnace by NI+PI method with optimal parameters, CO utilization ratio reaches above 46% when DRI reduction degree correspondingly increases by 12%, whats more, CO2 emission from the whole process is reduced by about 540 Nm3/tHM. The results prove that top gas recycling technology promotes reduction efficiency inside shaft furnace and greatly reduces the greenhouse gas emission, which will contribute to suppressing global warming.
著者
-
Zhang Lihua
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing
-
Wu Shengli
School Of
-
Xu Jian
School Of Material Science And Engineering Huazhong Univ. Of Science & Technology
-
Zhang Lihua
School Of Metallurgical And Ecological Engineering University Of Science And Technology Beijing
-
Yagi Jun-ichiro
Professor Emeritus Tohoku Univ.
-
Guo Xinying
School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing
関連論文
- Basic Characteristics of the Shaft Furnace of COREX® Smelting Reduction Process Based on Iron Oxides Reduction Simulation
- Catalytic Performance of Several Metallic Oxides on The Elimination Reactions of NO
- The Effect of Power Supply Voltage on Make & Break Duration of Relays(Session 4 -Relays-)
- Modelling of Multiphase Flow in a Blast Furnace : Recent Developments and Future Work
- Basic Characteristics of the Shaft Furnace of COREX^【○!R】 Smelting Reduction Process Based on Iron Oxides Reduction Simulation
- Dripping Liquid Metal Flow in the Lower Part of a Blast Furnace
- Increasing Lump Ores Proportion in Blast Furnace Based on the High-temperature Interactivity of Iron Bearing Materials
- Mathematical Model for Blast Furnace Burden Optimization Based on the High-temperature Reactivity
- Prediction of Pre-reduction Shaft Furnace with Top Gas Recycling Technology Aiming to Cut Down CO2 Emission
- Numerical Modeling of Reaction and Flow Characteristics in a Blast Furnace with Consideration of Layered Burden
- Numerical Analysis of the Characteristics Inside Pre-reduction Shaft Furnace and Its Operation Parameters Optimization by Using a Three-Dimensional Full Scale Mathematical Model